Collapsible tire-building form



7 July 19; 1927.

F. L. JOHNSON COLLAP SIBLE TIRE BUILDING FORM 1 v m m W S n m S A.

INVENTOR. FRI/V L. Jb/m/s w CC C/ ATTORNEY.

July 19,1927.

F. JOHNSON COLLAPSIBLE TIRE BUILDING FORM Filed Auz. 15. 1924 4 Shuts- Sheet 2 INVENTOR; f/M/wr L. Jo/nvsau 0 L Cg A TTORNEY.

' 1,636 05 July 1927' F. L. JOHNSON 5 COLLAPSIBLE TIRE BUILDING FORM- Filed Aug. 15, 1924 4 Sheets-Sheet 5 INVENTOR. fR/INK L, Jozwvsa/v C Q Q/Q ATTORNEY.

' July 19, 1927 1,636,055 F. L. JOHNSON COLLAPSIBLE TIRE BUILDING FORM Filed Auzz. 15. 19%? 4 Sheets-Sheet 3 w INVENTOR.

fP/I/vn L JOHNSON NBYW?@Q I ATTORNEY.

Patented July 19, 1927.

PATENT OFFICE;

FRANK L. JOHNSON, 01' AKRON, OHIO.

COLLAPSIBLE TIRE-BUILDING FORM.

Application filed August 15, 1924. Serial No. 732,285.

This invention relates to a form. of collapsible form or cores, such as used in the manufacture of pneumatic tires, which 18 of the type characterized by the fact that the form is composed of a plurality of sections which. are combined with a collapsing mechanism so that the form can be removed from within the tire casing without demounting the core from the tire machine.

One objectof the present invention s to improve upon cores of the type de.scr1bed, bythe construction of a core WlllCll can be collapsed quickly and easily and which will occupy, in collapsed position, a small area so that tires having small internal bead diameters can be removed easily. The new and improved core, embodiments of which are herein illustrated, is particularly useful in the manufacture of tires of large crosssection and small bead diameters, known in the'tr ade as balloon tires, as it permits the sections of the core to bearranged in such positions that the finished tire may be removed with great facility.

In the drawings are illustrated certain embodiments of the invention, it being understood that changes and modifications maybe made in the invention without departure from the essential features thereof, as stated in, the appended claims. 7

Figure 1 is a front elevation of a form of the invention, showing the core in assembled or circular position;

Figure 2 is a vertical section through the core on the line 2-2 of Figure 1;

Figure 3 isa view of the core in cross-section showing. thefirst movement in the collapsing operation; a c v Figure 4 is a similar view showing the second movement; r a

Figure 5 is a frontelevation of the core in fully collapsedposition;

Figure 6 is a front elevation of a modification of the core; and

Figure 7 is a section on the line 7-7 of Figure 6. a v i Referring to the form of the invention shown in Figures 1 to 5 inclusive, the core shown therein embodies a plate: 1, which is adapted to be attached to the forward end of the shaftof the tire making machine, or to the shaft of a tire building stand; The plate is provided with projecting arms 2, to which is rigidlyattached by bolts-3 a core section 4 which is tapered outwardly slightly, constitutinga key section. 1

the groove, as at 18, to

The remainder a plurality of sections 5, 6 and 7, which are hinged together so that when the three sections areremoved from their position in the plane of the section 4, these three sections can be folded up in any suitable manner to permit the removal of the tire. Ofthe three sections 5, 6 and 7, one section, preferably the central section, is provided with a; bracket 8 formed with bear- IILgS 9 in which is'secured a shaft 10, to

the ends of which are are carried upon 12. The link 12 posite the lugs a unit or from the plate 1, this movement freeing the tire from the stationary orrigid section 4:. The group of sections can then be swung into position substantially parallel to the plate 1, in which position the sections can be folded together upon their hinges to permit the removal of the tire.- v

One of the principal features of the invention, therefore, is the provision of a stationary or rigidsection and the pivotal mounting of the remaining sectionsso that they are movable as a group or unit, carr ing the tire T with them away from t e rigid section, The group of sections may be collapsed in any suitable manner.

In the form of core shown herein, the sections5 and 7 are connected to the section 6 by angular or oblique hinges 22, so that when" the core is fully tions pass one another tion shown in'Figure 5 of the drawings.

The section 4 and the adjacent ends of the sections 5 and 7 are provided with any suitable guiding device for guiding thesections of the core intocorrect position. In the form shown in the drawings, the section 4 carries dowels 1 6 which engage in and assume the posiof the core is, divided into collapsed the sec-- grooves or guideways 17 in the ends of the I trance of the dowels in the grooves, the base of the core may be extended at one side of afford a stop for the swinging core sections;

Any suitable means may be provided for locking the core in assembled position, so that it will not collapse accidentally while in use. As shown in the drawings, this may take the form of a spring latch 19 on the plate 1 which will engage with a projecting latch 20 secured to the link 12.

In the modified form ol the invent-ion shown in Figures 6 and 7, the core section 6 is divided into'two sections, (S and 6", which are pivotally connected by pins 25 to a knuckle joint 26 which is, in turn, pivoted to the link 27 by hinge pin :28. In this form of the invention, the plate 1 is 0t slightly different form from the plate 1, and a swinging bolt 29, provided with a nut 30, is pivoted on the platel and is received in a notch 31 in thelink 27, this arrangement being a substitute for the spring latch Of the other embodiment of the invention. In this form of the invention two guiding plates 18 are provided for the dowels 16.

It will be observed that by dividing the central section 6 into two parts, 6 and 6*, the collapsed core will be contracted into a much smaller compass when Where the section is in one piece and, as result, the core may be used conveniently in the manufacture of tires of extremely largecross-section and small bead diameters.

It is obvious that other changes and modifications may be made within the scope of the'invention as defined by the. claims appended hereto and such as fall within the fair range of the invention are intended to be covered hereby.

WVhat is claimed is: V

1. A collapsible form for usein building pneumatic tires, comprising a key section held at a fixed distance from the axis of the core and a plurality of hinged sections, the hinged sections being bodily movable-as a group to remove the tire from the key section. 1

Q. In a collapsible tire building form, a rigidly mounted key section, the remaining sectionsot the core being mounted so as to be bodily movable as a unit to remove the tire from the key section. i

3. In a collapsible core construction, a rigidly mounted key section and a group of hinged core sections constituting the balance of the core, the group being bodily movable as a unit outwardlyboth radially andlaterally from thekey section.

: 4. In a collapsible core construction, a rigidly mounted section, a second section mounted to move bodily outwardly .both radially and laterally of thekey section, and sections carried by and movable with the second section intermediate the aforesaid sections. f

. 5. In a collapsible core construction. a section held at a fixed distance tromthe of the core, a secondsection-mounted to plate, a core sectioncarried by the move bodily outwardly both radially and laterally of the key section, and sections carried by the movable section and adapted to fit between the movable and the rigid sections.

(5. In a collapsible core construction, a plate, a core section rigidly secured to the plate, a link p'ivotedupon the plate and a second core section pivoted on the end of the link, whereby the be movable to a position outwardly of but parallel to the plane of the rigid section.

In a collapsible core construction, a plate, a core section rigidly secured to the plate, a link pivoted upon the plate, a second core section pivoted to the end of the link and intermediate sections carried by the second section. i '8. In a collapsible core construction, a plate,'a core section rigidly secured to the plate, a link pivoted upon theplate, a second core section pivoted to the end of the link and intermediate sections located between the aforesaid sections.

9. In a collapsible core construction, a plate, a core section rigidly secured to the plate, a link pivoted upon the plate, a second core section pivoted to theend of the link and intermediate sections carried by and hinged to the second section.

10. In a collapsible core construction, a plate, a core section carried by the plate,"a link pivoted to the plate, a second core section pivoted to the end of the link and intermediate core sections located between the aforesaid sections.

11. In a collapsible core construction, a plate, a core section carried by the plate, a link pivoted to the plate, a second core section pivoted to the end of the link and in termediate core sections hinged to the ends or the second section.

12. In a collapsible core construction, a plate, a core section carried by the plate, a link pivoted to theplate, a second core section pivoted to theend of theilink anda third section hinged to the end of the second section.

13 In a collapsible core construction, a plate, a core section carried by the plate, a link pivoted to the plate, a second core section pivoted to the end of the link and intermediate core sections obliquely hinged to the ends of the second section.

14-. In a collapsible core construction, a-

plate, a core section carried by the plate, a link pivoted to the plate,'a second core sectionzpivoted to the end of the link, intermediate core sections hinged to the ends of the second section and a lock to maintain the core in assembled position."

15. .In a collapsible core construction, a plate, a link pivoted to the plate, the remaming core sections being carried by the link, and

second core section may '4 locking means to maintain the link in fixed relation with respect to the plate.

16. In a collapsible core construction, a plate, a fixed core section carried by the plate, a link pivoted to the plate, parallel pivots carried on the end of the link and a two-part core section, each part of which is carried upon one of said pivots.

17. In a collapsible core construction, a plate, a link pivoted to the plate, a knuckle pivoted to the end of the link, two pivots in the knuckle, and core sections carried upon the pivots.

18. In a collapsible core construction, a

plurality of core sections, all of which are pivoted together, and a series of pivots for said sections equal to the number of sections.

19. In a collapsible core construction, a portion of the core being composed of four sections which are pivoted together, the

outer two sections being obliquely pivoted to the plane of the core and the inner two sections being pivoted upon an axis normal to the plane of the core.

FRANK L. JOHNSON. 

